Technical Reference Notes
ALD12/18/20/25 Series
(Single Output 16
th
Brick)
ALD12/18/20/25 Single Output 16
th
Brick: 60Watts
The ALD12/18/20/25 series is Astec’s latest 16
th
Brick industry standard offering. Operating from an input voltage range of 36V to
75V, the series provides 6 configured outputs from 1.2V all the way up to 5V. It delivers up to 25A max current for 1.8V and
lower at impressive levels of efficiency. The series comes with industry standard features such as Input UVLO; non-latching OCP,
OVP and OTP; Output Trim; Differential Remote Sense pins. With its wide operating temperature range of -40°C to 85°C
ambient, the converters are deployable into almost any environment.
Electrical Parameters
Input
Input Range
Input Surge
36-75 VDC
100V / 100ms
Control
Enable
TTL compatible
(Positive or Negative Logic Enable Options)
Output
Special Features
•
•
•
•
•
•
•
•
Industry Standard 16
th
Brick Footprint
Low Ripple and Noise
Output pre-bias startup
Regulation to zero load
High Capacitive Load Start-up
Fixed Switching Frequency
Industry standard features: Input UVLO;
Enable; non-latching OVP, OCP and OTP;
Output Trim, Differential Remote Sense
Meets Basic Insulation
Load Current
Line/Load Regulation
Ripple and Noise
Adjust Range
Transient Response
Remote Sense
Over Current
Protection
Over Voltage
Protection
Over Temperature
Protection
Up to 25A max (V
O
≤
1.8V)
< 1% V
O
40mV
P-P
typical
±10% V
O
3% Typical deviation
50% to 75% Load Change
80µs settling time (Typ)
µ
+10%V
O
120% max
130% max
110
°
C
Environmental Specifications
•
•
•
-40ºC to 85ºC Operating Temperature
-40ºC to 125ºC Storage Temperature
MTBF > 1 million hours
Safety
UL + cUL 60950, Recognized
EN60950 through TUV-PS
MODEL: ALD12/18/20/25 SERIES
AUGUST 17, 2005 – REVISION C
SHEET 1 OF 20
ASTEC [ Astec America, Inc ]
